King, Carol Soucek, author
PBC International, 1996
Buku Teks
Knapp, Stephen, author
Pockport Pub, 1998
Buku Referensi
King, Carol Soucek, author
PBC International, 1995
Buku Referensi
Forch, Matthias, author
Springer Nature, 2019
eBooks
Wurm, Jan, author
Birkhal'user, 2007
Buku Teks